Spatial uniformity comparison of two nonimaging concentrators
Spatial uniformity comparison of two nonimaging concentrators
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两种非成像聚光器的空间均匀性比较
DOI：
10.1117/1.601534
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发表时间：
1997
影响因子：
1.3
通讯作者：
D. Dummer
中科院分区：
文献类型：
--
作者：
J. Rice;Y. Zong;D. Dummer
测量两个非成像集中器的空间均匀性，每个集中器后面紧跟着一个硅光电探测器。比较之间的复合抛物面聚光器（CPC）和？i/？o集中器。后者包括一个抛物线部分，然后是一个圆锥部分，以限制出射光束的发散角。的空间均匀性？i/？用从圆形孔径发散的f/4光束测量的聚光器在聚光器的入口孔径的中心4 mm处为1.2%，并且证明了当在需要小视场的应用中使用小面积（<2 mm直径）检测器时，使用这种类型的聚光器来有效地保持高吞吐量。镀金的均匀性？i/？用几乎准直的HeNe激光束测量的聚光器几乎没有那么好，部分原因是金的反射率不完美。CPC在f/4光束的均匀性是不是几乎一样好？i/？o f/4光束中的集中器。
The spatial uniformity of two nonimaging concentrators is measured, each with a silicon photodetector positioned immediately behind the concentrator. The comparison is made between a compound parabolic concentrator (CPC) and a ?i/?o concentrator. The latter consists of a parabolic section followed by a cone section to restrict the divergence angle of the exit beam. The spatial uniformity of the ?i/?o concentrator measured with an f/4 beam diverging from a circular aperture is 1.2% across the central 4 mm of the entrance aperture of the concentrator, and demonstrates the use of this type of concentrator for effectively maintaining high throughput when using small-area (<2-mmdiam) detectors in applications requiring small fields of view. The uniformity of the gold-coated ?i/?o concentrator measured with a nearly collimated HeNe laser beam is not nearly as good, due in part to the imperfect reflectance of gold. The uniformity of the CPC in the f/4 beam is not nearly as good as that of the ?i/?o concentrator in the f/4 beam.